Coal-bucket release.



PATENTED MAY 3, 1904.

A. R. BISSETT.

COAL BUCKET RELEASE.

APPLICATION FILED AUG. 17, 1903.

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UNITED STATES Patented May 3, 1904.

PATENT OEEIcE.

COAL-BUCKET RELEASE.

SPECIFICATION forming part of Letters Patent N0. 758,893, dated May 3, 1904.

Application filed August 1'7, 1903. Serial No, 169,716. (No model.)

To (Ii/Z whom, it may concern.-

Be it known that I, ALFRED R. BIssETT, a citizen of the Dominion of Canada, residing at Vancouver, in the Province of British Columbia, Canada, have invented a new and useful Coal-Bucket Release, of which the follov ing is a specification.

This invention relates to .an improved device for automatically releasing the lock of a skip or bucket such as is used for unloading coal from a vessel. In a bucket of this kind the bail, which is suspended in the hook of the hoisting-tackle, is secured to trunnions located below the center of gravity of the bucket when full, and a hinged lock secured to the upper edge of the bucket opposite the bail prevents the bucket overturning during the hoisting and traversing movements. \V hen, however, the bucket is over the dump and it is desired to empty it, the hinged lock bolt is turned clear of the bail, and the bucket being unstable on its trunnions tips and discharges its contents.

The invention which forms the subject of this application is designed to automatically effect the release of the look by a lowering movement of the bucket when over the dump. by which device the labor of an attendant to perform such service is saved.

The means by which this release is operated is described in the following specification and illustrated in the drawings which accompany it.

Figure 1 is a side elevation and part section of the release mechanism as applied to a bucket being hoisted to the peak of the gaff; Fig. 2, an end elevation of the adjustable ring, the position of which determines the moment of release; Fig. 3, an enlarged detail of the release-operating lever being lowered through the ring, and Fig. i an enlarged perspective detail of the bail-lock released and the operative pin connection withdrawn.

In the drawings the bucket is represented by 2 and its bail by 3, the hinged bail-lock being indicated by A. Just above the swivel 5, by which the hook 6 is usually connected to the hoisting-rope T, is interposed between the swivel and the rope a connecting member 8, having pivotally mounted to it on the pin withdrawn.

9 a short lever member 10, the outer end of which is normally directed downward and lies against a spring-stop 11. The lower or outer end of this lever 10 is connected by a light line or chain 12 to a pin 13, which enters freely from the outer side a corresponding pin-hole in the hinged bail-lock 4: or attached part, so that if the short lever 10 be lifted up the line 12 by means of the pin connection pulls the lock 4: up clear of the bail and thereafter pulls the pin 13 out of its pin-hole in the lock, and the bucket 2 is free to tip.

Fig. 1 in the drawings shows the device in the locked position, while the detail Figs. 3 and i show the lock l released and the pin 13 This movement of the short lever is effected by means of a ring15 of suifieient weight, which is suspended from the peak of the gaff 16, to which the hoisting-tackle sheave 1.7 is fastened. The ring 15 is of such size relative to the normal position of the spring-held arm or lever 10 as to permit its passage upward therethrough, but to prevent its downward passage until its upward movement has elevated the chain 12 sufliciently to withdraw the pin 1?). The hoisting-rope 7 passes through the ring 15, the height of which is regulated by the two suspending-lines 18, which pass over small sheaves 19 on each side of the gaff and are carried down it and secured to some conveniently-accessible position.

It is obvious that the lever-carrying member 8 may be connected direct to the hook 6 or may be integral with it, as a shank, without departing from the spirit of the invention.

It will be noticed that no additional movement of the hoisting-gear is necessitated to operate the device; but the bucket is simply drawn up toward the peak to the height necessary to clear intervening obstacles, the position of the ring 15 being regulated to such a height as will tip the bucket at the required place.

\Vhen the swing of the gaff is checked over the dump, the bucket is lowered, the lock is automatically released, and the bucket tips.

The invention can be readily applied to existing bucket-gear, as it requires no alteration of existing parts, the lever-carrying member being simgly interposed in the hoisting-tackle,

and an eyebolt for the release-pin 13 can be secured to the existing lock; but although I have shown it in combination with a swivel connection such forms no essential part of the device, as it is obvious that the lever-carrying member 8 may be directly connected to the hook 6 or may even form an integral part of I it shank.

adjacent to the hook and depending against a v spring-check, a flexible connection between the outer end of said lever and the slidable pin of the lock, and a ring adjustably secured to the gafl or derrick from which the hoistingtackle is suspended, said ring being adapted to allow the hoisting-tackle and the pivoted leverfto pass upward through it, but will engage and operate the lever as it moves downward through it, wherebythe lock is released and its operating-pin withdrawn.

2. In a device of the class described; the combination with the lock by which the tipping is controlled, of means for eflecting the lock-release comprising a ring ad justably suspended to the gafi or derrick to which hoisting-tackle is supported, said ring being adapted to allow the hoisting-tackle to pass therethrough, a lever pivotally mounted in an attachment interposed in the hoisting-tackle above the hook and falling down-ward against a spring-check that will project the end of the lever into engagement with the ring, and a connection between the outer end of the lever and the tipping-lock whereby the upward movement of the lever caused by engagement with the upper side of the ring as the hoisting-tackle descends, will effect the release of the lock and allow the bucket to tip.

3. In a device of the class described; means for effecting the release of the tipping-lock comprising a pin endwise slidable in a line toward the hinge of the lock, a flexible connection between the pin and a lever on the hauling-tackle that will pull the lock out of engageme'nt with the bail of the bucket and withdraw the pin from the lock, and means for operating said lever by the descent of the hoisting-tackle.

4. In a device of the class described,designed to effect the release of the hinged lock 4 from the bail 3; the combination with such and the hoisting-tackle 6 and 7 of the ring 15 adjustably suspended by lines 18, the lever 10 pivotally mounted on the pin 9 and falling against the spring-stop 11, the flexible connection 12 secured to the outer end of the lever 10 and having at the other end a pin 13 slidable endwise in the lock 4, all substantially as described.

In testimony whereof-l have signed my name to this specification in the presence of two subscribingwitnesses.

ALFRED R. BISSETT. In presence of- O. M. MARPOLE, ROWLAND BRITTAIN. 

